I've been using Wolverine Heating & Cooling since we moved in twenty years ago. They service my furnace regularly and I'd give them six stars if I could! I call and easily schedule appointments. The owner is a responsive and personable guy. The original furnace always ran beautifully. Recently, at my request, Wolverine Heating & Cooling replaced my furnace with a more efficient model. They did a beautiful job. Since my husband died, it gives me great peace of mind to know that I can continue calling them for servicing on my new unit. Other professionals doing work in my home have commented on the wonderful installation job done by Wolverine Heating & Cooling.